The condition (pressure, flow, temperature, etc.) that a control system is designed to maintain.

Triangular drafting tools used with a T-square to produce vertical or inclined lines.

The brickwork surrounding the furnace in some older boiler designs. In modern boilers the setting includes the water walls, insulation, refractory and outer cladding that encloses the furnace.

A device used to transmit energy from the motor to its load.

A brass or stainless steel replaceable sleeve placed over the shaft where it passes through the stuffing box. Protects the shaft from wear by the packing.

An action that causes molecules of a body to be slid past each other. Scissors perform a shearing effect on paper. Shear force is used to punch out holes in a sheet of stainless steel. Shear stress is stress caused by a force that tends to cause particles to slide past each other.

Consists of one or more steel plates rolled into a cylindrical form and welded together.

A type of heat exchanger in which a nest or coil of tubes or pipes containing a fluid is inserted into a shell containing a second fluid. Heat is transferred from one fluid to the other through the tube or pipe walls.

A potentially life threatening condition that arises when there is an absence of adequate blood circulation throughout the body.

A circuit condition in which the current bypasses a section of the circuit and returns to the source.

Sudden reduction in boiler water level as the steam production rate is decreased.

The front and/or back of an impeller.

A metal band that connects the outer ends of turbine blades to provide support and reduce vibration.

To connect in parallel or a parallel connection.

A dc generator in which the method of supplying excitation current to the field by connecting the field windings in parallel (shunt) with the generator’s output terminals.